Hair loss after Famotidine in dogs

The FDA has received 44 reports of hair loss in dogs after Famotidine. That is 1.7% of all reports for this medicine, compared with 1.0% across reports for all dog medicines, so it is reported unusually often with this medicine.

44Reports
52%Marked serious
18%Recovered
20%Died or euthanised
9 daysTypical onset
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How soon it started

Same day
5 16%
1–2 days
4 13%
3–7 days
5 16%
1–4 weeks
11 35%
Over a month
6 19%

How the animals did

Recovered
7 16%
Recovered with lasting effects
1 2.3%
Still unwell when reported
10 23%
Died
1 2.3%
Euthanised
8 18%
Not known
17 39%

Problems reported at the same time

Age of the animals

Under 1 year
1
1–3 years
6
4–7 years
16
8–11 years
14
12+ years
7

About this medicine

Type: medicine.

Questions owners ask

Can Famotidine cause hair loss in dogs?
44 reports link the two, but a report alone does not prove the medicine was the cause: other illnesses, other medicines or coincidence can be involved. Your vet can judge it for your animal.
How soon after a dose was it reported?
In half of the reports with dates, it started within 9 days of the first dose.
What should I do?
Don't give another dose until you've spoken to your vet, and keep the packaging so you can tell them the product and dose. Your vet can also report it to the FDA (or you can, through the manufacturer or FDA form 1932a).

Hair loss with similar medicines

All reported side effects of Famotidine in dogs · Medicines most reported with hair loss